Isuzu 1999 RODEO Workshop Manual page 932

locks, improperly formed or damaged terminals, and
poor terminal–to–wire connection.
f The MAP sensor shares a 5 Volt Reference with the TP
sensor and Fuel Pressure sensor.
If these codes are also set, it could indicate a
problem with the 5 Volt reference circuit.
f The MAP sensor shares a ground with the TP sensor
and Fuel Pressure sensor.
f Damaged harness – Inspect the wiring harness for
damage; shorts to ground, shorts to battery positive,
DTC P1107 – MAP Sensor Circuit Intermittent Low Voltage
Step
1 Was the "On–Board Diagnostic (OBD) System Check"
performed?
2 Is DTC P0107 also set?
3 Is DTC P1122 and/or P0462 also set?
4 Check for a poor 5 volt reference circuit terminal
connection at the MAP sensor.
Was a problem found?
5 Check the MAP signal circuit between the MAP sensor
connector and the PCM for an intermittent open or
short to ground.
Was a problem found?
6 Check for an intermittent short to ground on the 5 volt
reference circuit between the PCM and the following
components:
f
Fuel Tank Vapor Pressure Sensor
f
TP sensor
Was a problem found?
7 Check for a poor 5 volt reference terminal connection at
the PCM.
Was a problem found?
8 Check for an intermittent open or a faulty splice in the 5
volt reference circuit.
Was a problem found? (if no, start with the diagnosis
chart for other sensors in the circuit and see if 5V
returns.)
9 Replace the faulty harness connector terminal for the 5
volt reference circuit and/or the MAP signal circuit as
necessary.
Is the action complete?
10 Repair the intermittent open/short circuit in the wiring
harness as necessary.
Is the action complete?
RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
Action
and open circuits. If the harness appears to be OK,
observe the MAP display on the Tech 2 while moving
connectors and wiring harnesses related to the sensor.
A change in the display will indicate the location of the
fault.
Reviewing the Failure Records vehicle mileage since the
diagnostic test last failed may help determine how often
the condition that caused the Diagnostic Trouble Code to
be set occurs. This may assist in diagnosing the
condition.
Value(s)
— Go to Step 2
Go to DTC
P0107 chart
—
— Go to Step 6
— Go to Step 9
Go to Step
—
Go to Step
—
— Go to Step 9
Go to Step
—
— Verify repair
— Verify repair
6E1–305
Yes No
Go to OBD
System
Check
first Go to Step 3
Go to Step 4
Go to Step 5
10 Go to Step 8
10 Go to Step 7
Go to Step 8
Refer to
Diagnostic
Aids
10
—
—